shithub: riscv

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devmnt: fix mntcache()

make sure mntcache() wont cache data beyond what was read from
the block list.

--- a/sys/src/9/port/devmnt.c

+++ b/sys/src/9/port/devmnt.c

@@ -669,8 +669,7 @@

 		m = r->reply.count;

 		if(m > r->request.count)

 			m = r->request.count;

-

-		for(b = r->b; m > 0 && b != nil; b = b->next) {

+		for(b = r->b; m > 0 && b != nil; m -= n, b = b->next) {

 			n = BLEN(b);

 			if(m < n)

 				n = m;